Development of a new football stadium on the West Side of Manhattan is at least a month behind the schedule set out by the city, state and the Jets when an agreement to build the $1.4 billion project was first announced last spring.

Mayor Bloomberg has adamantly insisted that construction on the 75,000-seat stadium begin by late spring, before the International Olympic Committee selects a host for the 2012 Games – but the city has yet to submit a formal plan to the state.

In the agreement struck with the Jets, the Empire State Development Corp. was to have given preliminary approval to a general project plan for the stadium in June, followed by a public hearing last month. Final approval is slated for November.

So far, none of those deadlines has been met.

Charles Gargano, chairman of the ESDC, said his agency has been waiting for the city to deliver its building and financing plan.

“They’re the lead agency. Once they get the financing plan in place, we’ll start working on it,” Gargano said.

Deputy Mayor Dan Doctoroff said the stadium project is only about a month behind schedule, which he said wouldn’t impede the city’s goal of starting construction on the project by June. “The project plan is nearly completed,” he said.

Assemblyman Richard Gottfried, a West Side Democrat who has been battling to block the stadium, called the delay “outrageous.” “I’ve been demanding to know the details of the plan, including the financing,” Gottfried said. “They either have no idea what they are doing or they are keeping it secret.”

A spokeswoman for Doctoroff said the details will be released soon.

“We continue to work very closely with the state and the Jets, and we hope the general project plan will be ready shortly,” she said.

Once the city delivers the project plan, state economic-development officials have to put out a 60-day notice before holding a public hearing. After hearings, the ESDC board will take a final vote on the project.

Approvals are also needed from the MTA and the state’s Public Authorities Control Board.